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Example code of cheprasov/php-redis-lock

Informations about the package php-redis-lock

MIT license Latest Stable Version Total Downloads

RedisLock v1.0.3 for PHP >= 5.5

About

RedisLock for PHP is a synchronization mechanism for enforcing limits on access to a resource in an environment where there are many threads of execution. A lock is designed to enforce a mutual exclusion concurrency control policy. Based on redis.

Usage

Create a new instance of RedisLock

Usage for lock a process

Methods

RedisLock :: __construct ( RedisClient $Redis , string $key [, int $flags = 0 ] )

Create a new instance of RedisLock.

Method Pameters
  1. RedisClient $Redis - Instanse of RedisClient
  2. string $key - name of key in Redis storage. Only locks with the same name will compete with each other for lock.
  3. int $flags, default = 0
    • RedisLock::FLAG_DO_NOT_THROW_EXCEPTIONS - use this flag, if you don't want catch exceptions by yourself. Do not use this flag, if you want have a full control on situation with locks. Default behavior without this flag - all Exceptions will be thrown.
Example

bool RedisLock :: acquire ( int|float $lockTime , [ float $waitTime = 0 [, float $sleep = 0.005 ] ] )

Try to acquire lock for $lockTime seconds. If lock has acquired in another thread then we will wait $waitTime seconds, until another thread release the lock. Otherwise method throws a exception (if FLAG_DO_NOT_THROW_EXCEPTIONS is not set) or result. Returns true on success or false on failure.

Method Pameters
  1. int|float $lockTime - The time for lock in seconds, the value must be >= 0.01.
  2. float $waitTime, default = 0 - The time for waiting lock in seconds. Use 0 if you don't wait until lock release.
  3. float $sleep, default = 0.005 - The wait time between iterations to check the availability of the lock.
Example

bool RedisLock :: update ( int|float $lockTime )

Set a new time for lock if it is acquired already. Returns true on success or false on failure. Method can throw Exceptions.

Method Pameters
  1. int|float $lockTime - Please, see description for method RedisLock :: acquire
Example

bool RedisLock :: isAcquired ( )

Check this lock for acquired. Returns true on success or false on failure.

bool RedisLock :: isLocked ( )

Check this lock for acquired and not expired, and active yet. Returns true on success or false on failure. Method can throw Exceptions.

bool RedisLock :: isExists ()

Does lock exists or acquired anywhere? Returns true if lock is exists or false if is not.

Installation

Composer

Download composer:

wget -nc http://getcomposer.org/composer.phar

and add dependency to your project:

php composer.phar require cheprasov/php-redis-lock

Running tests

To run tests type in console:

./vendor/bin/phpunit

Something doesn't work

Feel free to fork project, fix bugs and finally request for pull

All versions of php-redis-lock with dependencies

PHP Build Version
Package Version
Requires php Version >=5.5
cheprasov/php-redis-client Version ^1.7.2
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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